I'm wondering what service I have with T-Mobile, BIS or BES. By the definitions below, I would guess BES. I get an email at work or home and I get the message within a couple minutes on my BB. But, I have my 3 accounts show up under one folder....so does that mean I have both?? I don't think I have the real-time sync of contacts and calendar. When I delete an email, it's removed from both my BB and my email account. I'm soooo confused.